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2018 5th Annual Tree Diversity Conference


To protect our urban forests, which are threatened by pests and pathogens, a greater variety of tree species is necessary.


For our fith annual conference we will continue to explore the relationships between landscape design, horticultural practices and the use of a greater variety of tree species.


Between them, our speakers this year boast an extravagant depth of experience ranging from worldwide plant exploration to landscape and garden design, promotion of new plant materials, administration of some of our country's most noted horticultural conferences and institutions and hands-on experience with plant testing and data collection.


Public $75, includes all programming and lunch

$60 Promo, includes all programming and lunch

*Promotional price available to all Members of Colorado Tree Coalition


Symposium will be held at Denver Botanic Gardens in Mitchell Hall.


Small Ornamental Trees: Versatile Plants for Difficult Locations

During this lecture, learn about the diversity of small ornamental landscape trees great for difficult growing conditions. Some varieties have been known to the nursery and landscape industry for years, but many others are new and interesting species and cultivars. As part of his talk, Andrew Bunting describes Chicagoland Grows, a collaboration between Chicago Botanic Garden, the Morton Arboretum and the Chicago area green industry whose objective is to trial and introduce promising new tree species and cultivars.


Andrew Bunting is Assistant Director of the Garden and Director of Plant Collections at the Chicago Botanic Garden. For 26 years he was Curator at the Scott Arboretum at Swarthmore College. From 1991-1992 he was curator at Chanticleer in Wayne, Pennsylvania. For several years he has been involved with the NAPCC (North American Plant Collections Consortium) where he has served as Chair, Vice Chair, Reviewer, Chair of the Magnolia Group and now is the Liaison for Multi-institution Collections, i. e., Quercus, Acer, Magnolia, and cycads. Andrew is the past president of the Magnolia Society International and The Delaware Center for Horticulture. He is has also served as Chair of Horticulture for the Philadelphia Flower Show; served on the Woody Plant Conference Committee for 16 years; and has done committee work for Bartram’s Garden, Tyler Arboretum and Awbury Arboretum. He has published over 100 articles in American Gardener, Arnoldia, The Hybrid, Fine Gardening, The Magnolia Society Journal, Green Scene and Organic Gardening. He has lectured extensively in the United States as well as England, Belgium, Poland and New Zealand. Andrew has participated in plant expeditions to China, Taiwan, Vietnam and is planning expeditions to The Republic of Georgia, Azerbaijan, Armenia, Japan and South Africa in 2018. Andrew is the recipient of American Public Gardens Association Professional Citation and received the Chanticleer Scholarship in Professional Development in 2010. His home garden in Swarthmore, Pennsylvania, Belvidere, has been featured in This Old House Magazine and in the Wall Street Journal. Andrew published his first book in 2015 by Timber Press, The Plant Lover’s Guide to Magnolias.




24 Years of Tree Growth in Westminster, Colorado

The Colorado State Forest Service, along with City of Westminster Forestry Staff, recently remeasured trees as part of a 24-year diameter growth rate study and updated the report initially published in 2000. The report characterized the long-term growth of 19 common urban tree species grown on publicly maintained land in Westminster for 1992-2016. The average trunk-diameter growth rates of the nearly 1,500 studied trees can be used by homeowners, landscape architects, designers/installers and tree care professionals to select trees for planting that will most quickly provide shade, aesthetics and other benefits after planting.


Keith Wood graduated with a degree in Forest Biology from Colorado State University in 1986 and went on to study aspen ecology on the West Slope of Colorado, receiving his Master's degree in 1988. Keith worked as an Assistant Resource Forester for the Missouri Department of Conservation from 1988-1989 and from 1989 to 2002 worked as City Forester for the City of Westminster, Colorado. Keith also taught Arboriculture at Front Range Community College while City Forester in Westminster. Since 2002 Keith has filled the position of Community Forester with the Colorado State Forest Service (CSFS), and is currently the Community Forestry Program Manager in the Communications and Communities Division at CSFS and the Executive Administrator of the Colorado Tree Coalition. Keith also teaches an Urban & Community Forestry course at Colorado State University in Fort Collins. Keith has been a Certified Arborist since 1995 and a Certified Forester since 2002.



Observations of Trees, Climate trends, and Industry Support through the Lens of an Eastern Arboretum

Arboreta provide valuable information for the local green industry and the public at large. This lecture examines the interdependence between Kentucky's Boone County Arboretum and the green industry in the Greater Cincinnati Metro area. Learn how the Arboretum enriches the professional development of the green industry and the various ways they support each other. Climate change has been an important focus of the information flow between arboreta and the green industry as a whole. Learn about arboricultural changes at Boone County and other arboreta and botanical gardens in the Ohio Valley region. Lastly, learn about some failures and successes with trees at the Boone County Arboretum to see whether there are some recommendations that might translate to the potential plant palette of the greater Denver area.


Kristopher Stone, growing up less than 30 minutes from Kentucky's renowned Bernheim Arboretum, was inspired to obtain a B.S. in Plant and Soil Science from the University of Kentucky. Currently, Kris is Director of Boone County Arboretum and has been with the facility since January of 2002. Kris is highly active in community organizations in the Greater Cincinnati region, building community awareness and networking for the Arboretum. He serves as past President of the Northern Kentucky Urban and Community Forestry Council, Advisory member of Boone County Urban Forest Commission, past President and Board member of the Kentucky Invasive Plant Council, and is an ex-officio board member of Friends of Boone County Arboretum. Kris serves on the steering committee of the Theodore Klein Plant Award Selection Committee, and the Kentucky Urban Forestry Council, ensuring Arboretum support of these efforts. He also serves on various other ad hoc committees for community and state organizations when time allows. Kris is a writer for Kentucky Gardener Magazine where he contributes monthly as the Ask the Expert columnist. As Director of the Arboretum Kris provides leadership for staff in the areas of policy-making, development, budget management, funding, planning, organizing of operations, and staffing for facility needs. With a staff of only 3 full-time personnel and 6 seasonal college interns taking care of and managing a 121-acre facility, everyone wears each other's hats!





Ten Trees that should be Used More in the Rocky Mountain Region

During this lecture, David Temple shares his list of high performing Rocky Mountain Region trees species and cultivars that thrive in the challenging soil and climate conditions found not only in southwestern Colorado but also in many parts of the Front Range. As a bonus, Temple shares Colorado horticultural history pertaining to two legendary figures: George Kelly – one of the founders of Denver Botanic Gardens, its predecessor the Colorado Forestry and Horticulture Association and Arapahoe Acres Nursery and Earl Sinnamon – President of Denver's Swingle Lawn, Tree and Landscape Care company from 1955 to 1980.


David Temple since 2002 has been the proprietor of Trees of Trail Canyon, located in McElmo Canyon near Cortez, Colorado. David's nursery is perhaps best known as a supplier of large caliper trees to landscape architects, contractors and municipalities. David first became involved in the green industry in 1978 by founding Animas Valley Arborist, a tree care and landscaping firm based in Durango, Colorado. David has been a member of the International Society of Arboriculture for 37 years, a board-certified master arborist for seven years, and is a past-President of the ALCC (Associated Landscape Contractors of Colorado).





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